Fixed checking for valid video device when setting the video mode

HISTORY

@@ -787,7 +787,7 @@ Video Disk Recorder Revision History
 - Made the volume, mute and power keys work when a menu is active, too (thanks
   to Matthias Weingart).
 
-2001-10-05: Version 0.97
+2001-10-06: Version 0.97
 
 - Implemented a lock file to prevent more than one instance of VDR from removing
   files from the video directory at the same time.
@@ -804,3 +804,4 @@ Video Disk Recorder Revision History
   whether they still use the correct channel number.
 - Fixed the "EPG bugfix" (sometimes had duplicate information in Subtitle and
   Extended Description).
+- Fixed checking for valid video device when setting the video mode.

dvbapi.c

@@ -7,7 +7,7 @@
  * DVD support initially written by Andreas Schultz <aschultz@warp10.net>
  * based on dvdplayer-0.5 by Matjaz Thaler <matjaz.thaler@guest.arnes.si>
  *
- * $Id: dvbapi.c 1.130 2001/09/30 11:28:58 kls Exp $
+ * $Id: dvbapi.c 1.131 2001/10/06 15:14:17 kls Exp $
  */
 
 //#define DVDDEBUG        1
@@ -3169,7 +3169,7 @@ void cDvbApi::SetModeNormal(bool FromRecording)
 
 void cDvbApi::SetVideoFormat(videoFormat_t Format)
 {
-  if (fd_video)
+  if (fd_video >= 0)
      CHECK(ioctl(fd_video, VIDEO_SET_FORMAT, Format));
 }